Related Experiment Videos
Granular cells in a cellular neurilemmoma
P M Carpenter1, M R Grafe, N M Varki
1Department of Pathology, University of California, San Diego Medical Center.
Archives of Pathology & Laboratory Medicine
|October 1, 1992
Summary
This study details a rare case of cellular neurilemmoma containing granular cell components. Both cell types exhibited distinct characteristics, including S100 immunoreactivity, highlighting a unique tumor presentation.
Area of Science:
- Pathology
- Oncology
- Cell Biology
Background:
- Neurilemmomas, also known as Schwannomas, are typically benign tumors arising from Schwann cells.
- Granular cell tumors (GCTs) are often considered to be of neural or Schwann cell origin.
- Tumors exhibiting both neurilemmoma and granular cell elements are exceptionally rare in medical literature.
Observation:
- A case of cellular neurilemmoma with focal granular cell differentiation is presented.
- Immunohistochemical analysis revealed S100 and Leu-7 positivity in Schwann cells.
- Granular cells demonstrated periodic acid-Schiff (PAS) positivity, diastase resistance, and strong S100 immunoreactivity.
Findings:
- Electron microscopy confirmed the presence of electron-dense granules within the granular cells.
- Distinct interdigitating processes and elongated nuclei characteristic of Schwann cells were observed.
- The co-existence of these two distinct cellular components within a single neoplasm is a key finding.
Implications:
- This case contributes to the understanding of tumor differentiation and lineage.
- It underscores the potential for Schwann cells to exhibit divergent differentiation.
- Further research into the pathogenesis of such mixed tumors may offer new diagnostic and therapeutic insights.